diff --git a/docs/evidence/specialized-stock-snapshot-source-20260905.json b/docs/evidence/specialized-stock-snapshot-source-20260905.json
new file mode 100644
index 0000000..47c1abd
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+++ b/docs/evidence/specialized-stock-snapshot-source-20260905.json
@@ -0,0 +1,94 @@
+{
+  "schemaVersion": "fidc-specialized-stock-snapshot-source/v1",
+  "measuredAt": "2026-09-05T03:38:00+08:00",
+  "host": "192.168.31.177",
+  "engineCommit": "d79678d8509b40ec085f2fa0a7c1e7cb90c95810",
+  "serviceCommit": "9fd5a9e6d5668af57f6942fc3c4127953545d9c6",
+  "runnerBinarySha256": "3f9ce258d3b055097b0cb9e4ae4df423b3d584420befae4d85cdd7ccc51e38bf",
+  "implementation": {
+    "description": "monomorphize indexed and daily-view stock snapshot sources, reuse execution/factor DailySnapshotView in selection loops, and keep the shared stock-state builder free of runtime Optional lookup branches",
+    "eligibleUniverseRowChanged": false,
+    "runtimeOptionalViewBranch": false,
+    "selectionResultCached": false,
+    "factorValueCached": false,
+    "pitSemanticsChanged": false,
+    "componentBenchmark": {
+      "rows": 6000,
+      "rounds": 200,
+      "indexedSeconds": 0.008542,
+      "dailyViewSeconds": 0.002821,
+      "speedup": 3.027294
+    }
+  },
+  "primaryFiveYearContract": {
+    "startDate": "2021-08-23",
+    "endDate": "2026-08-28",
+    "frequency": "1d",
+    "matchingType": "next_bar_open",
+    "totalReturn": 0.9219861819172002,
+    "tradeCount": 26088,
+    "canonicalSha256": "b42fea66237d06eadb24f6b8c9e2760e7319fe3699f315b99e01f433ef2aa234",
+    "resultStoreSha256": "92343fb369fea68b2544b654151c5c43a935940580b14afbe8eefb3844f72a54",
+    "processCold": {
+      "totalSeconds": 17.62,
+      "dataSeconds": 13.03,
+      "engineSeconds": 3.976
+    },
+    "processHotEngineSeconds": [4.085, 3.91, 3.893, 4.125, 3.874],
+    "processHotMedianEngineSeconds": 3.91,
+    "typedHelperBaselineMedianEngineSeconds": 4.729,
+    "observedMedianImprovementPercent": 17.318672023683654,
+    "resultConsistent": true,
+    "terminalAuditStatus": "clean"
+  },
+  "secondaryFiveYearContract": {
+    "totalReturn": 1.1342962298106998,
+    "tradeCount": 19404,
+    "canonicalSha256": "0dbd3fad624097c673c4a5ec2f545f95e9c21d1d5337bb2b48ffeb22b16cb2b9",
+    "resultStoreSha256": "416d2f87241fb4c6b917f6aeecb588f82f6e7d51a103f4c53a74d11971f16839",
+    "engineSeconds": [3.672, 3.655, 3.676, 3.689],
+    "medianEngineSeconds": 3.676,
+    "typedHelperBaselineMedianEngineSeconds": 4.049,
+    "observedMedianImprovementPercent": 9.212151148431715,
+    "resultConsistent": true,
+    "terminalAuditStatus": "clean"
+  },
+  "profile": {
+    "runId": "btr_1788550694645_3730056_10",
+    "engineSeconds": 4.278,
+    "allThreadEventCycles": 95711324146,
+    "comparisonAllThreadEventCycles": 110359308122,
+    "observedCycleReductionPercent": 13.272993665207602,
+    "marketBySymbolIdPercent": 1.69,
+    "factorBySymbolIdPercent": 0.13,
+    "candidateBySymbolIdPercent": 0.32,
+    "comparisonMarketBySymbolIdPercent": 3.46,
+    "comparisonFactorBySymbolIdPercent": 2.66,
+    "comparisonCandidateBySymbolIdPercent": 2.51
+  },
+  "memory": {
+    "serviceCgroupCurrentBytes": 11498143744,
+    "serviceCgroupPeakBytes": 11501256704,
+    "processRssKiB": 11216788,
+    "processAnonymousKiB": 11200492,
+    "typedHelperBaselineCgroupCurrentBytes": 11495362560,
+    "observedCgroupIncreaseBytes": 2781184
+  },
+  "testGate": {
+    "coreUnitTotal": 421,
+    "corePassed": 415,
+    "ignoredManualBenchmarks": 6,
+    "failed": 0,
+    "integrationSuitesPassed": true
+  },
+  "remoteArtifacts": [
+    "/srv/fidc/canonical/run/fidc-private/evidence/specialized-stock-snapshot-source-primary-20260905.json",
+    "/srv/fidc/canonical/run/fidc-private/evidence/specialized-stock-snapshot-source-secondary-20260905.json",
+    "/srv/fidc/canonical/run/fidc-private/evidence/specialized-stock-snapshot-source-profile-20260905/perf.data",
+    "/srv/fidc/canonical/run/fidc-private/evidence/specialized-stock-snapshot-source-profile-20260905/perf-report.txt"
+  ],
+  "acceptance": {
+    "status": "accepted_generic_monomorphized_snapshot_source",
+    "reason": "both five-year strategies preserve exact outputs and improve stable medians, lookup hotspots fall materially, and the implementation avoids the enlarged row and runtime Optional branches that caused the prior rejected design"
+  }
+}